摘要
采用草酸溶液电解、氢氧化钾溶液电解、热碱性铁氰化钾溶液和王水侵蚀方法,研究了四种侵蚀方法对双相不锈钢SAF2906显微组织的侵蚀效果。结果表明,采用草酸溶液电解方法可以显示双相不锈钢显微组织,但在光学显微镜下铁素体和奥氏体两相组织区分不明显;热碱性铁氰化钾溶液或者氢氧化钾溶液电解两种侵蚀方法可以很好地区分铁素体和奥氏体两相组织和辨别诸如σ相等有害相的存在,利用金相图像软件可以进行两相比例的测定;王水侵蚀方法具有同时显示奥氏体和铁素体晶界效果。
Erosion effect on microstructure of duplex stainless steel 2906 was studied with different etching methods such as electrolytic etching in oxalic acid solution or in potassium hydroxide solution and immersed etching way in hot basic potassium ferricyanide solution or chloroazotic acid. The results show that after electrolytic etching with oxalic acid solution the microstructure of duplex stainless steel could be revealed,but the color distinction between the ferrite and austenite phase is not apparent by optical microscope. The microstructure of dual phases is distinguished after immersed etching with hot basic potassium ferricyanide solution or potassium hydroxide solution and the percentage of ferrite or austenite could be determined by metallographic image software,and the harmful phase such as σ phase could be found too. The grain boundary of austenite and ferrite phase would be displayed simultaneously after etching with chloroazotic acid.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第5期181-183,共3页
Heat Treatment of Metals
关键词
双相不锈钢
显微组织
侵蚀方法
duplex stainless steel
microstructure
etching method